What happens
Henry delivers his most famous battle cry before the siege of Harfleur. He urges his soldiers to gather their courage and strength, comparing them to tigers and invoking the memory of their warrior ancestors. He appeals to English pride and nobility, calling them greyhounds straining at the leash, and commands them to charge with the cry 'God for Harry, England, and Saint George!' as they storm the breach.
Why it matters
This speech is the engine of Henry's transformation from wayward prince to warrior king. By framing war as an appeal to honor and ancestry rather than mere duty, Henry recruits his soldiers' pride as a weapon. He acknowledges the gap between peace and war—'In peace there's nothing so becomes a man / As modest stillness and humility'—but then demands a complete inversion of civilian virtue into military ferocity. The speech works through vivid physical language: stiffening sinews, summoning blood, disguising 'fair nature' with rage. Henry is not asking his men to be brave in the abstract; he's asking them to transform their bodies into instruments of war, to become tigers rather than men.
The speech also establishes Henry's gift for democratic persuasion. Rather than invoking his royal authority alone, he appeals to shared Englishness, to the names of soldiers' 'fathers of war-proof' who fought and won before them. He notices each man—there is 'none of you so mean and base / That hath not noble lustre in your eyes'—and tells them their breeding is worth proving. This is flattery with a military edge: you are good enough to fight, therefore fight. The speech ends with an image of soldiers 'like greyhounds in the slips, / Straining upon the start,' ready to be released. The cry 'God for Harry, England, and Saint George!' collapses the hierarchy—the king, the nation, and the saint are one chant, one moment, one cause.